\section{Target Group Analysis}
This section is based on an initial interview conducted with fellow Medialogy students from the fourth semester, with focus on an audio course that was taught. A target group will be chosen based on the results. The same goes for the product requirements that will be inspired from the needs extracted from the interviews.

\subsection{Initial Interview }
The initial motivation for this project originates from the fact that the group had difficulties understanding the audio theories during the course \textit{Sound and Music Computing}, which is part of the curriculum of fourth semester in Medialogy. Finding material that didn't expect the reader to already have a good and solid understanding of signal processing turned out to be hard. This led to the idea that perhaps other students also were having problems with understanding the material presented in the audio course.

In order to gain insight into a broader consensus within this area of concern, multiple interviews, with fellow students were conducted to verify the presupposition that other Medialogy students had difficulties understanding the course. 

Organized interviews of one-hour length with four groups (approximately 24 students) showed a pattern. The interviews were executed as open dialogues where the group members could share their opinion on the course. The results indicated that all groups shared difficulties understanding a great portion of concepts in audio theory. Only elements such as amplitude, frequency, period, wavelength, delay, and feedback were generally understood, while the audio effects and audio filters were primarily known only by the members who had prior experience with music production.

When inquired what the groups felt they were missing, a general consensus pointed towards a lack of visual representations and auditory examples. Furthermore, they felt a lack of focus on actual implementation, rather than the theoretical mathematics behind it. Many topics appeared too abstract to comprehend. In one of the lectures, the lecturer presented the frequency domain using an app on an Android tablet. It took input from the microphone and visualized it on the screen in an easy-to-understand manner. Almost all interviewees responded that it was a good method of illustration and that they would be interested in seeing more like this. This ignited the idea for this project; to build an app that could be interactive and help in learning about audio effects, especially targeted at people who struggle with the basics.

\subsubsection{Conclusion on Interviews}
In summary, the general opinion gathered from the interviews about the audio course was as follows:
\begin{itemize}
\item Lacking visual representations of sound concepts, effects and filters.
\item Lacking auditory examples of manipulated sounds.
\item Too much focus on the theoretical aspects of sound.
\item More concrete examples, e.g. in form of interactive apps.
\end{itemize}

\subsection{Target Group}
It seemed that there was a demand for examples in general - both visual and auditory. Furthermore, many students responded that the big focus on the mathematical aspects made it difficult to see the larger picture and understand what the result of each effect and filter are. Therefore, the desired target group is people who are involved in audio learning, but demand a form of supplement to aid in their comprehension.

A target group was chosen based on the data gathered from the interviews with the Medialogy students. The target group has been chosen to be people who:

\begin{itemize}
\item Are part of a higher education and are currently taking one or more audio-related courses.
\item Do not have an engineering background - they need to only have a very basic pre-understanding.
\item Lack understanding of basic audio concepts.
\end{itemize}

Based on the needs of the target group, the following requirements were constructed:

\begin{enumerate}
\item \textbf{Functional requirements:}
\begin{enumerate}
\item The product needs to visualize audio concepts.
\item The product needs to play back audio.
\item The product needs to implement certain effects based on the sound course of fourth semester of Medialogy.
\item The product needs to show in real-time how tweaking parameters changes the result of the output signal.
\end{enumerate}
\item \textbf{Non-functional requirements:}
\begin{enumerate}
\item The product must not require understanding of sound theory prior to use.
\item The product needs to work as a supplement to a sound course.
\item The product needs to be easily accessible to students.
\item The design of the program should fit on both PC and tablet.
\end{enumerate}
\item \textbf{Usability and user experience requirements:}
\begin{enumerate}
\item The interface needs to be simple to not intimidate the student inexperienced in sound theory.
\item The interface needs to be quick to navigate for the student to easily use it during courses with as little distraction as possible.
\item The interface must be simple and easy to navigate with as few button presses and menus as possible.
\item The interface needs to minimize possible errors made by the user, to motivate the user to freely play around with the controls.
\end{enumerate}
\end{enumerate}